﻿using System;

namespace _59.关键字
{
    class Program
    {
        static void Main(string[] args)
        {
            /* int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int omt 
             *short short short short short short short sohort short short short short short short short short short short short short short short short short short 
             *long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long 
             *float float float float float float float float float float float float float float float float float float float float float float float float float float float 
             *double double double double double double double double double double double double double double double double double double double double double double double 
             *decimal decimal decimla decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal 
             *bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool 
             *char char char char char char char char char char char char char char char char char char char char char char char char char char char char char char char char 
             *while while while while while while while while while while while while while while whilew while while while while while whiel while while while whilew while while 
             *switch swotch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             *foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach
             *enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum\
             *struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct 
             *out out out out out out out out out out out out out out out outout ref ref ref ref ref ref ref ref ref ref ref ref ref ref ref ref ref ref ref ref ref ref ref 
             *params params  params params params params params params params params params params params params params params params params params params params params params
             *return return return return return return return return return return return return return return return return return return return return return return
             *new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new new 
             *this this this this this this this this this this this this this this this this this this this this this this this this this this this this thist this this this 
             *set set set set set  set set set set set set set set set set set set set set get get get get get get get get get get get get get get get get get get get get get 
             *base base base base base base base base base base base base base base base base base base base base base base base base base base base base base base base base 
             *virtual virtual virtual virtual virtual virtual vittual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual
             *override override override override override override override override override override override override override override override override override override
             *abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract
             *pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             *sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sesaled sealed
             *interface interface interface interface interface interface interface interface interface interface interface interface interface interface iterface interface interface 
             *public public public public public public public public public public public public public public public public public public public public public public public public 
             *static static static static stataic static static static static static stataic static sratic static static static static static static staticstatic  static static 
             *private  private private private private private private private private private private private private private private private private private private private private
             *protected protected protected protected protected protected protected protedcted protected protected protected protected protected protected protected protected protected 
             *internal internal internal internal internal internal internal internal inrernal internal internal internal internal internal internal internal internal internal internal
             * int int int int int int int int int int int int int short short short short short short short short short short short long long long long long long long long long 
             * float float float float float float float float float float float float float float float float float float float float float float float double double double double double
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal
             * bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool bool char char char char char char char char char char char char char string string string
             * string string switch switch switch switch switch switch switch switch switch switch switch switch while while while while while while while while while while 
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach const const const const const const const const const const const const const
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum struct struct struct struct struct struct struct struct struct struct struct struct struct 
             * out out out out out out out out out out out out out ref ref ref ref ref ref ref ref ref ref ref ref ref ref params params params params params params params params 
             * return return return return return return return return return return return return return new new new new new new new new this this this this this this this this this 
             * get set get set get set get set get set get set get set get set get set get set get set get set get set get set get set get set get set get set get set 
             * base base base base base base base base base base base base base base base base base base base base base base base base base base base 
             * virtual virtual virtual virtual virtual virtual vitrual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual
             * override override override override override override override override override override override override override override override override override override override
             * abstract abstract abstract abstract abstract abstract abstract abstrast abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial
             * sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed
             * interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface 
             * public public public public public public public public public public public public public public public public public public public public public public public public 
             * static static static static static static static static static static static static static static static sratic static static static static static static static static 
             * private private private private private private private private private private private private private private pravate private private private private private private 
             * protected protected protected protected protected protected proyected protected protected protected protected protected protected protected protected protected protected
             * internal inrernal internal internal inrernal internal internal internal internal internal internal internal internal internal internal internal internal internal internal
             * short short short short short short short short short short short short short short short short short short short short short short shrot short short short 
             * float float float float float float float float float float float float float float float flpat float float float float flaoat float float float float 
             * deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam deciam
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreacg foreach foreach foreach foreacg foreach foreach foreach foreach 
             * const const const const const const const const const const const const const const const const const const const const const const const const const const 
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             * while while while while while while while while while while while while while while whiel whiel while while while while whilewhile while while 
             * struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct 
             * return return return return return return return return return return return return return return return return return return return return return 
             * virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual
             * override override override override override override override override override override override override override override override override override 
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             * sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed selaed sealed sealed sealed 
             * private private private private private pravite private private private private private private private private private private private private 
             * interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface 
             * protected protected protected protecded protected protected protected protected protected protected protected protected protected protected protected protected 
             * internal internal int ernal internal internal internal internal interial internal internal internal internal internal internal internal internal internal 
             * short short short short short short short short short short short short short short short short short short short short short short short short short short 
             * float float float float float float float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decmal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal
             * foreach foreach foreacg foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach
             * const const const const const const const const const const const const const const const const const cosnt const const const const const const cosnt const 
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enumenum enum enum enum enum enum enum enum enum enum enum enum enum enum enum
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             * while while while while while while while while while while while while while while while while while while while while while while while while wihle while 
             * struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct 
             * return return return return return return return return return return return return return return return return return return return return return return 
             * virtual cittual virtual virtual virtual virtual vitrual virtual virtual virtual virtual virtual virtual virtual vitrual virtual virtual virtual virtual 
             * override override override override override override override override override override override override override override override override override 
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial
             * sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealsed sealed sealed sealed sealed sealed
             * private private private private private private private private private private private private private private private private private private private private 
             * interface interface interface inrerface interface interface interface interface interface interface interface interface inteface interface interface interface 
             * num enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum 
             * switch switch switcprotected protected protected protected protected rotected protected protected protected protected protected protected protected protected protected protected 
             * internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal inrernal 
             * short short short short short short short short short short short short short short short short short short short short short short short short short short short 
             * float float float float float float float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal 
             * foreach foreacg foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach 
             * const const const const const const const const const const const const const const const const const const const const const const const const const 
             * enum enum enum eh switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             * while while while while while while while while while while while while while while while while while while while while while while while while while 
             * struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct 
             * return return return return return return return return return return return return return return return return return return return return return return 
             * virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual
             * override override override override override override override override override override override override override override override override override 
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             * sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed
             * private private private private private private private private private private private private private private private private private private private private 
             * interface interface interface interface interface interface interface interface interface interface interface interface iterface interface interface interface 
             * internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal 
             * protected protected protected protected protected protected protected protected protectged protected protected protected protected protected protected protected 
             * short short short short short short short short short short short short short short short short short short short short short short short short short short
             * float float float float float float float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach 
             * const const const const const const const const const const const const const const const const const const const const const const const const const const 
             * while while  while while while while while while while while while while while while while while while whiel while while whiel while while while whilke whiel
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             * struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct 
             * return return return return return return return return return return return return return return return return return return return return return return 
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum 
             * virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual 
             * override override override override override override override override override override override override override override override override override override 
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             * sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed 
             * private private private private private private private private private private private private private private private private private private private 
             * interface inrerface interface interface interface interface interface interface interface interface interface interface interface interface interface interface 
             * internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal 
             * protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected 
             * short short short short short short short short short short  short short short short short short short short short short short short short short short short 
             * float float float float float float float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal deciaml decimal decimal decimal decimal 
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach 
             * const const const const const const const const const const const const const const const const const const const const const const const const const const const
             * while while while while while while while whiel whiel while whiel while while hwile whiel while while while while while while while while while while while while 
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch
             * struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct 
             * return return return return return return return return returnr return return return return return return return return return return return return return return 
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum 
             * virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual 
             * override override override override override override override override override override override override override override override override override override 
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             * sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sesaled 
             * private private private private private private private private private private private private private private private private private private private private 
             * interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface 
             * internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal
             * protected protected protected protected protected protected protectedd protected protected protected protected protected protected protected protected protected protected 
             *  where where where where where where where where where where where where where where where where where where where where where where where where where whereh where
             * short short short short short short short short short short short short short short short short short short short short short short short short short short 
             * float float float float float flaot float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal 
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach 
             * const const const const const const const const const const const const const const const const const const const const const const const const const const const 
             * while while while while while while while while while while whiel whiel while while while while while while while while while while while while while while while 
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             * struct struct swruct struct struct struct struct struct struct struct struct strucy struct struct struct struct struct struct struct struct struct struct struct 
             * return return return return return return return return return return return return return return return return return return return return return return return 
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum 
             * virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual 
             * overrite override override override override override override override override override override override override override override override override override 
             * adstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             * sealed sealed dsealed sealed sealed sealed sealed sealed sealed seaeld sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed
             * private private private private private private private private private private private private private private private private private private private private private 
             * interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface 
             * internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal
             * protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected 
             * where where where where where where where where where where where where where where where where where where where where where where where where where where 
             * ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayListi ArrayList ArrayList
             * Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable
             * short short short short short short short short short short short short short short short short short short short short short short short short short short 
             * float float floatfloat float float float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal 
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach 
             * const const const const const const const const const const const const const const const const const const const const const const const const consr const const 
             * while while while while whiel whiel while while while while while while while while while while wheil while while while while while while while while while 
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch
             * struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct 
             * return return return return return return return return return return return return return return return return return return return return return return return
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum 
             * virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual
             * override override override override override override override override override override override override override override override override override override 
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial
             * sealed sealed sealed sesaled sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed 
             * private private private private private private private private private private private private private private private private private private private 
             * interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface
             * internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal 
             * protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected 
             * where where where where where where where where where where where where where where where where where where where where where where where where where where where
             * ArrayList ArrayList ArrayList ArrivList ArrayList ArriyList ArrayList ArrayList ArrayList ArrayList Arraylist ArrayList ArrayList ArrayList ArrayList 
             * Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable
             * delegate delegate delegate delegate delegate delegate delegate delegate delagate delagate delagate delegate delagate delagate delagate delagate delagate delegate 
             * short short short short short short short short short short short short short short short short short short short short short short short short short short 
             * float float float float float float float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal 
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach 
             * const const const const const const const const const const const const const const const const const const const const const const const const const const const
             * while while while while while while while while while while while while while while while while while while while while while while while while while while while 
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             * struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct struct
             * return return return return return return return return return return return return return return return return return return return return return return return 
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum
             * virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual 
             * override override override override override override override override override override override override override override override override override override
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             * sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealead sealed sealed sealed sealed seaeld sealed sealed sesaled sealed sealed sealed sealed
             * private private private private private private private private private private private private private private private private private private private private private 
             * interface interface iterface interface interface interface interface interface interface interface interface interface interface interface interface interface interface 
             * internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal
             * protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected
             * where where where where where where where where where where where where where where where where where where where where where where where where where where where 
             * ArratList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList 
             * Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable
             * delegate delegate delegate delegate delegate delagate delegate delagate delagate delagate delagate delagate delagate delagate delagate delagate delagate delagate 
             * Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action
             * shortshort short short short short short short short short short short short short short short short short short short short short short short short short short 
             * float float float float float float float float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal 
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach
             * const const const const const const const const const const const const const const const const const const const const const const const const const const const 
             * while while while while while while while while while while while while while while while whiel while while while while while while while while while while while 
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             * return return return return return return return return return return return return return return return return return return return return return return return 
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum
             * virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual 
             * override override override override override override override override override override override override override override override override override override 
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             * sealed sealed sealed sealed selaed sealed selaed selaed sealed sealed sealed selaed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed
             * private private private privayr private private private private private private priate private private private private private private private private private 
             * interface interface interface interface interface interface interface interface interfaceinterface interface interface interface interface interface interface interface
             * internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal internal
             * protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected 
             * where where where where where where where where where where where where where where where where where where where where where where where where where where where where 
             * ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList
             * Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable 
             * delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate 
             * Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action
             * Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func 
             * event event event event event event event event event event event event event event event event event event event event event event event event event event event
             * short short short short short short short short short short short short short short short short short short short short short short short short short short short 
             * float float float float float float float float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal 
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach forach foreach foreach foreach foreach foreach foreach foreach foreach foreach 
             * const const const const const const const const const const const const const const const const const const const const const const const const const const const
             * while while while while while while while while while while while while while while while while while while while while while while while while while while 
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             * return return return return return return return return return return return return return return return return return return return return return return return 
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum 
             * virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual ivrtual virtual virtual virtual 
             * override override override override override override override override override override override override override override override override override override 
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial
             * sealed sealed sealed selaed sealed seaeld sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed 
             * private private private private private private private private private private private private private private private private private private private private 
             * interface interface interface interface interface interface interface interface interface interface interface interface interfac interface interface interface interface 
             * protected  protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected
             * where where where where where where where where where where where where where where where where where where where where where where where where where where where where where
             * ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList ArrayList 
             * Hastable Hastable Hastable Hastable Hastable Hastable Hastavle Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable Hastable 
             * delegate delegate delegater delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate delegate 
             * Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action Action 
             * Func Func Func Func Func Func Func Func Func Func  Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func Func 
             * event event event event event event event event event event event event event event event event event event event event event event event event event event event event event
             * short short short short short short short short short short short short short short short short short short  short short short short short short short short 
             * float float float float float float float float float float float float float float float float float float float float float float float float float float float 
             * decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal deciamal decimaL decimal decimal decimal decimal
             * foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach 
             * const const const const const const const const const const const const const const const const const const const const const const const const cont const const const const 
             * while while while while while while while while while while while while while while while while while while while while while while while while while while while while 
             * switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch swithc switch switch switch switch 
             * return return return return return return return return return return return return return return return return return return return return return return return return 
             * enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum 
             * cirtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtualvirtual virtual virtual virtual virtual virtual virtual
             * override override override override override override override override overriude override override override override override override override overrid eoverride override override
             *adstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract absstract abstract abstract abstract abstract abstract abstract abstract 
             *pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             *sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealead sealed sealed sealed sealed seaeld sealed selaed selaed sealed sealed sealed sealed sealed 
             *private private private private private private private private private private private private private private private privatye private private private private private private 
             *interface interface interface interface interface interface interface interfaceinterface interface interfaace interface interface interface interface interface interface interface
             *protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected protcted protected protected 
             *short short short short short short short short short short short short short short short short short short short short short short short short short short short 
             *float float float float float float float float float float float float float float float float float float float float float float float float float float float 
             *decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal decimal 
             *foreaach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach foreach 
             *const const const const const const const const const const const const const const const const const const const const const const const const const const const 
             *while while while while while while while while while while while while while while while while while while while while while while while while while while while 
             *switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch switch 
             *return return return return return return return return return return return return return return return return return return return return return return return 
             *enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum enum
             *virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual virtual 
             *override override override override override override override override override override override override override override override override override override override 
             *abstract abstract abstract abstract abstracr abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             *pertial pettial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             *sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed sealed  sealed sealed sealed sealed sealed sealed sealed sealed sealed 
             *interface interface interface interface interface interface interface interface interface interface interface interface interface iterface interface interface interface 
             *protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected protected 
             *internal internal inrernal internal internal internal internal internal iternal internal internal internal internal internal internal internal internal internal internal 
             *整数类型short int long  short16 int32 long64 
             *浮点类型float decimal double float8位 decimal double16位 
             *非数值类型bool char string  bool char string 
             *判断语句if else ,switch if else switch  
             *循环结构for foreach while  dowhile  for  foreach while dowhile 
             *声明常量 const 产生随机数 Random  const Random  
             *声明枚举enum 声明结构struct enum struct 
             *高级参数 out ref params out ref params 
             *返回值 return return 
             *new关键字 this关键字 new this 
             *调用父类构造函数base关键字 base 
             *标记虚方法 virtual 标记后重写 override virtual override 
             *标记抽象类 abstract abstract abstract abstract 
             *标记部分类 pertial  pertial pertial 
             *标记密封类 sealed  sealed sealed 
             *标记接口 interface interface interface interface 
             *用来约束泛型方法 where where where
             *声明委托 delegate delegate delegate 
             *声明没有返回值但有多个参数的委托 Action Action Action  Action<写参数> a = new Action(); 
             *声明有返回值有多个参数的委托 Func Func Func Func<写参数> f = new Func (); 里面最后一个参数是返回值类型
             *创建一个多线程 Thread t = new Thead()；
             *想要程序变得坚韧 try{写容易报错的代码}
             *                 catch{写报错后显示的代码
             *访问修饰符：public 公开的公用的 private 私有的 protected 受保护的 internal 只能在项目中访问
             * public private protected internal protected internal 
             * short short short short short short short short short short short short int int int int int int int int int int int long long long long long long long long long 
             * float float float float float float float float float float float double double double double double double double double double decimal decimal decimal decimal decimal 
             * boorl bool bool bool bool bool char char char char char char char char char string string string string string string string string string 
             * if else switch for foreach while dowhile const Random 
             * enum enum enum enum enum enum enum enum enum enum enum struct struct struct struct struct struct struct struct 
             * out ref params out ref params out ref params out ref params 
             * return return return return return return return return new new new new new this this this this this this this this this 
             * base base base base base base base base base base base base base base virtual override virtual override virtual override virtual override 
             * abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract abstract 
             * pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial pertial 
             * sealed sealed selaed selaed selaed selaed selaed selaed sealed sealed sealed sealed sealed sealed selaed sealed sealed sealed sealed sealed sealed 
             * interface interface interface interface interface interface interface interface interface interface interface interface interface interface interface 
             * where where where where where where where where where where where where where where where where where where where where where where where where where 
             * delegate delegate delegate delegate delegate delegate delegate delegate delegate delagate delagate delegate delegate delegate
             * public private protected protected internal internal 
             * float
             * short int long double float decimal char string new this base virtual override virtual override abstract abstract pertial pertial sealed sealed 
             * interface where delegate delegate Thread t =new Thead(); Thread t =new Thread ();
             * public private protected protected internal internal internal 
             * virtual override abstract pertial sealed interface where delegate delegate delegate 
             * Thread t =new Thread();
             */

            //Console.WriteLine(Convert.ToString(25,2));
            //Console.WriteLine(Convert.ToString(65,2));
            //Console.WriteLine(Convert.ToString(30,10));
            //Console.WriteLine(Convert.ToString(13,16));


        }

    }
}
